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removesilence: add squash property

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allows to output buffers without timestamp gap when silence is removed

Closes #63
This commit is contained in:
Nicola Murino 2018-11-26 16:36:18 +01:00
parent 18c8557836
commit 50a84f8d7b
2 changed files with 37 additions and 2 deletions
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36
gst/removesilence/gstremovesilence.c
View file

@ -1,6 +1,7 @@
/* GStreamer
* Copyright (C) 2011 Tiago Katcipis <tiagokatcipis@gmail.com>
* Copyright (C) 2011 Paulo Pizarro <paulo.pizarro@gmail.com>
* Copyright (C) 2012-2016 Nicola Murino <nicola.murino@gmail.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@ -57,7 +58,8 @@ enum
{
PROP_0,
PROP_REMOVE,
PROP_HYSTERESIS
PROP_HYSTERESIS,
PROP_SQUASH
};
@ -121,12 +123,18 @@ gst_remove_silence_class_init (GstRemoveSilenceClass * klass)
"Set the hysteresis (on samples) used on the internal VAD",
1, G_MAXUINT64, DEFAULT_VAD_HYSTERESIS, G_PARAM_READWRITE));
g_object_class_install_property (gobject_class, PROP_SQUASH,
g_param_spec_boolean ("squash", "Squash",
"Set to true to retimestamp buffers when silence is removed and so avoid timestamp gap",
FALSE, G_PARAM_READWRITE));
gst_element_class_set_static_metadata (gstelement_class,
"RemoveSilence",
"Filter/Effect/Audio",
"Removes all the silence periods from the audio stream.",
"Tiago Katcipis <tiagokatcipis@gmail.com>\n \
Paulo Pizarro <paulo.pizarro@gmail.com>");
Paulo Pizarro <paulo.pizarro@gmail.com>\n \
Nicola Murino <nicola.murino@gmail.com>");
gst_element_class_add_static_pad_template (gstelement_class, &src_template);
gst_element_class_add_static_pad_template (gstelement_class, &sink_template);
@ -145,6 +153,8 @@ gst_remove_silence_init (GstRemoveSilence * filter)
{
filter->vad = vad_new (DEFAULT_VAD_HYSTERESIS);
filter->remove = FALSE;
filter->squash = FALSE;
filter->ts_offset = 0;
if (!filter->vad) {
GST_DEBUG ("Error initializing VAD !!");
@ -176,6 +186,9 @@ gst_remove_silence_set_property (GObject * object, guint prop_id,
case PROP_HYSTERESIS:
vad_set_hysteresis (filter->vad, g_value_get_uint64 (value));
break;
case PROP_SQUASH:
filter->squash = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -195,6 +208,9 @@ gst_remove_silence_get_property (GObject * object, guint prop_id,
case PROP_HYSTERESIS:
g_value_set_uint64 (value, vad_get_hysteresis (filter->vad));
break;
case PROP_SQUASH:
g_value_set_boolean (value, filter->squash);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
@ -220,11 +236,27 @@ gst_remove_silence_transform_ip (GstBaseTransform * trans, GstBuffer * inbuf)
if (filter->remove) {
GST_DEBUG ("Removing silence");
if (filter->squash) {
if (GST_BUFFER_DURATION_IS_VALID (inbuf)) {
filter->ts_offset += inbuf->duration;
} else {
GST_WARNING ("Invalid buffer duration: ts_offset not updated");
}
}
return GST_BASE_TRANSFORM_FLOW_DROPPED;
}
}
if (filter->squash && filter->ts_offset > 0) {
if (GST_BUFFER_PTS_IS_VALID (inbuf)) {
inbuf = gst_buffer_make_writable (inbuf);
GST_BUFFER_PTS (inbuf) -= filter->ts_offset;
} else {
GST_WARNING ("Invalid buffer pts, update not possibile");
}
}
return GST_FLOW_OK;
}

3
gst/removesilence/gstremovesilence.h
View file

@ -1,6 +1,7 @@
/* GStreamer
* Copyright (C) 2011 Tiago Katcipis <tiagokatcipis@gmail.com>
* Copyright (C) 2011 Paulo Pizarro <paulo.pizarro@gmail.com>
* Copyright (C) 2012-2016 Nicola Murino <nicola.murino@gmail.com>
*
*
* This library is free software; you can redistribute it and/or
@ -43,6 +44,8 @@ typedef struct _GstRemoveSilence {
GstBaseTransform parent;
VADFilter* vad;
gboolean remove;
gboolean squash;
guint64 ts_offset;
} GstRemoveSilence;
typedef struct _GstRemoveSilenceClass {